Walter Kamrau is accused by his wife to have killed her lover,the young Magnus Kölner.Walter denies the murder of Magnus Kölner,he knows about the relationship between his wife and Magnus, he has spoken to Magnus about this relationship and had asked to give up this relationship.The day after the murder, a young woman, Babette König presents herself as the new domestic help,the former housekeeper has told to the agency, that Mr. Kamrau needs a new cleaning lady.
—zutterjp48